A rivet nut heat treatment apparatus

Abstract

The application relates to the field of metal piece heat treatment equipment, and particularly discloses a rivet nut heat treatment equipment which comprises a vibrating screen, a material uniformizing conveying belt, a heat treatment box and a discharging plate for connecting the material uniformizing conveying belt and the heat treatment box, and further comprises: a feeding frame arranged between the vibrating screen and the heat treatment box, the material uniformizing conveying belt being installed on the feeding frame in an upwardly inclined manner along the conveying direction of the material uniformizing conveying belt; a conveying chain installed on the feeding frame and synchronously transmitted with the material uniformizing conveying belt, the conveying chain being arranged on the inner ring of the material uniformizing conveying belt; a plurality of magnetic pieces are arranged on the conveying chain and are distributed on the conveying chain in a length direction of the conveying chain; and a material stirring mechanism for stirring the materials on the material uniformizing conveying belt. The scattered rivet nuts pressed on the material uniformizing conveying belt are stirred and fallen by the material stirring mechanism, the flattening rate of the rivet nuts on the material uniformizing conveying belt can be obviously improved, and the uniform heat treatment effect of the batch rivet nuts can be ensured.

Description

Technical Field

[0001] This application relates to the field of heat treatment equipment for metal parts, and in particular to a heat treatment equipment for rivet nuts. Background Technology

[0002] Rivet nuts, also known as pull nuts or rivet caps, are primarily made of carbon steel, aluminum, and stainless steel, with carbon steel being the most common. They are mainly used in the fastening of various metal sheets and pipes in the manufacturing industry, and are widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, and decoration. Rivet nuts were developed to address the shortcomings of welded nuts on thin metal sheets or pipes, such as easy melting, easy deformation of the base material during welding, and easy stripping of internal threads. They do not require tapping internal threads or welding nuts, offer strong riveting, high efficiency, and ease of use. Generally, after the rivet nut is manufactured, it needs to undergo heat treatment to eliminate internal stress.

[0003] Chinese patent CN114015853A, published in the relevant technology, discloses a heat treatment device for motor vehicle pistons, comprising: a feeding mechanism, a material equalization mechanism, a feeding mechanism, and a heat treatment chamber. The feeding mechanism includes a feeding pipe, with a connecting pipe fixedly connected to the top end of the feeding pipe and a discharge pipe fixedly connected to one end of the connecting pipe. The material equalization mechanism includes a material equalization box, with a support frame fixedly connected to the bottom end of the material equalization box. The bottom end of the discharge pipe extends through to the inner wall of the top of the material equalization box. A first driving mechanism is vertically arranged at the top of the material equalization box. The motor has an output end that extends through the material distribution box and is fixedly connected to a cylinder via a rotating shaft. A feeding pipe is fixedly connected to one side of the bottom of the material distribution box. The feeding mechanism includes a conveyor frame, a second drive motor is installed on one side of the bottom of the conveyor frame, a drive wheel is fixedly connected to the output end of the second drive motor via a rotating shaft, a driven wheel is connected to one side of the top of the drive wheel via a belt, a roller is fixedly connected to one side of the driven wheel through the rotating shaft extending through the conveyor frame, a conveyor belt is installed on the top of the roller, and multiple transport boxes are evenly spaced on the top of the conveyor belt.

[0004] Regarding the aforementioned technologies, one end of the rivet nut has an enlarged countersunk head or a flat head. When the rivet nuts are transported in batches to the heat treatment chamber for processing, they need to be flattened and not overlapped to ensure good heat treatment uniformity. However, after the material distribution box distributes the workpieces evenly, the countersunk heads or flat heads of the rivet nuts are still prone to overlapping due to incomplete separation, which will still affect the uniform heat treatment of some parts. Summary of the Invention

[0005] To address the issue of uneven heat treatment of rivet nuts in batches due to overlapping and interlocking of the flat or countersunk heads during the uniform material preparation process, this application provides a rivet nut heat treatment device.

[0006] The heat treatment equipment for rivet nuts provided in this application adopts the following technical solution:

[0007] A heat treatment device for rivet nuts includes a vibrating screen, a material distribution conveyor belt, a heat treatment chamber, and a discharge plate for connecting the material distribution conveyor belt and the heat treatment chamber. It also includes:

[0008] A feeding rack is located between the vibrating screen and the heat treatment box, and the material conveyor belt is installed on the feeding rack at an upward inclination along its conveying direction;

[0009] A conveyor chain is installed on the loading rack and is synchronously transported with the material equalization conveyor belt. The conveyor chain is arranged in the inner circle of the material equalization conveyor belt.

[0010] Magnetic components are provided in multiple quantities and are distributed at intervals along the length direction of the conveyor chain;

[0011] The material feeding mechanism is used to move the material on the material feeding conveyor belt.

[0012] By adopting the above technical solution, the carbon steel rivet nuts to be processed are batched into a vibrating screen. The vibrating screen vibrates and screens the rivet nuts to separate them as much as possible. Then, they are placed onto a material distribution conveyor belt. With the synchronous transmission of the conveyor chain and the material distribution conveyor belt, multiple magnetic components attract some of the rivet nuts onto the material distribution conveyor belt and lift them up with the material distribution conveyor belt. During this process, some of the loose rivet nuts that are freely piled on the attracted rivet nuts fall off under their own weight and the influence of the inclined conveying path of the material distribution conveyor belt. This can, to a certain extent, ensure that the rivet nuts conveyed to the heat treatment box are in a flat state, and ensure the uniformity of heat treatment of the batch of rivet nuts.

[0013] Furthermore, during the process of the material distribution conveyor belt lifting the attracted rivet nuts, the material feeding mechanism pushes the material on the material distribution conveyor belt, which can also push the loose rivet nuts pressed onto the attracted rivet nuts off the material distribution conveyor belt. This ensures that the rivet nuts after being uniformly transported by the material distribution conveyor belt can be transported to the heat treatment box as completely and evenly as possible, effectively ensuring the batch uniform heat treatment of the rivet nuts.

[0014] Optionally, the magnetic component includes a plurality of segmented magnetic blocks arranged along the width direction of the material conveyor belt, with a gap larger than the material size between two adjacent segmented magnetic blocks.

[0015] By adopting the above technical solution, the travel distance of scattered rivet nuts on the adsorbed rivet nuts when they fall freely or are dislodged by the material feeding mechanism is reduced, making it easier for these scattered rivet nuts to detach, and further improving the flattening rate of batches of rivet nuts when conveyed by the material feeding conveyor belt.

[0016] Optionally, the extension direction of the segmented magnetic blocks forms an angle with the width direction of the material conveyor belt.

[0017] By adopting the above technical solution, the rivet nuts adsorbed on the material distribution conveyor belt can form a guide slope, which is more conducive to the loose rivet nuts sliding off, and greatly improves the flattening rate of a batch of rivet nuts when they are conveyed by the material distribution conveyor belt.

[0018] Optionally, the feeding mechanism includes:

[0019] An air jet is installed on the loading rack and the air jet direction is directed towards the upper section of the material conveyor belt.

[0020] A power unit for driving the jet component to reciprocate.

[0021] The jet component moves along the conveying direction of the material leveling conveyor belt, or perpendicular to the conveying direction of the material leveling conveyor belt, or at an angle to the conveying direction of the material leveling conveyor belt.

[0022] By adopting the above technical solution, the rivet nuts on the material distribution conveyor belt pass sequentially through the jetting component. The jetting component ejects a high-speed airflow that impacts the rivet nuts on the conveyor belt. Loose rivet nuts stacked or pressed onto the attracted rivet nuts are less affected by the magnetic attraction from the magnetic component, and thus these loose rivet nuts will fall off the conveyor belt under the impact of the airflow from the jetting component, reducing the probability of rivet nuts stacking on the conveyor belt. Furthermore, the power component drives the jetting component to reciprocate, causing the angle of the airflow impact on the rivet nuts to continuously change, further increasing the probability of blowing off loose rivet nuts pressed onto the attracted rivet nuts.

[0023] Optionally, the cycle time of one reciprocating motion of the jet component is less than the cycle time of two adjacent magnetic components passing through the jet component.

[0024] By adopting the above technical solution, it can be ensured that each magnetic component can be impacted at least once by the airflow ejected by the jet component, thus ensuring the jet component's effect of removing scattered rivet nuts.

[0025] Optionally, the air outlet of the jet is inclined from bottom to top.

[0026] By adopting the above technical solution, during the conveying of rivet nuts by the material conveyor belt, the high-speed airflow ejected by the jet component blows the scattered rivet nuts from bottom to top, which can promote the effect of the scattered rivet nuts falling off the adsorbed rivet nuts, so as to facilitate the removal of the scattered rivet nuts.

[0027] Optionally, the jet component includes a mounting rod and a plurality of jet nozzles mounted on the mounting rod.

[0028] By adopting the above technical solution, the jet component is divided into multiple jet nozzles, which can reduce the contact area between the high-speed airflow ejected from the jet nozzles and the scattered rivet nuts. This can maximize the eccentric impact of the high-speed airflow on the scattered rivet nuts, thereby promoting the rotation of the scattered rivet nuts on the material distribution conveyor belt and increasing the probability of the scattered rivet nuts that are pressed onto the material distribution conveyor belt falling off.

[0029] Optionally, the blowing areas of two adjacent jet nozzles on the material conveyor belt do not overlap.

[0030] By adopting the above technical solution, when the jet nozzle reciprocates under the action of the power component, the jet areas of two adjacent jet nozzles do not overlap, which can realize the intermittent impact of multiple jet nozzles on scattered rivet nuts, and can realize the multiple frequency jumping of scattered rivet nuts on the attracted rivet nuts. It is suitable for situations where the length of the magnetic component is long and the stroke of the scattered nuts is long.

[0031] Optionally, the feeding mechanism includes:

[0032] A flexible agitator is provided along the width direction of the material equalization conveyor belt, and the flexible part on the flexible agitator is in interference contact with the surface of the upper section of the material equalization conveyor belt.

[0033] A drive assembly is used to drive the flexible agitator to reciprocate along the width direction of the material conveyor belt.

[0034] By adopting the above technical solution, when the material conveyor belt conveys the rivet nuts past the flexible agitator, the flexible agitator sweeps the scattered rivet nuts on the material conveyor belt, which can dislodge the scattered rivet nuts as much as possible; and the drive component further drives the flexible agitator to reciprocate, giving the scattered rivet nuts the kinetic energy to fall off, which can further promote the dislodgement of the scattered rivet nuts.

[0035] Optionally, a receiving hopper is installed on the feeding rack, with one end of the receiving hopper located below the discharge port of the vibrating screen and the other end in contact with the material equalization conveyor belt;

[0036] The receiving hopper is inclined downwards along the conveying direction of the material distribution conveyor belt.

[0037] By adopting the above technical solution, the vibrating screen separates the piles of rivet nuts into the receiving hopper. The inclined surface on the receiving hopper guides the rivet nuts to accumulate at the junction of the receiving hopper and the material distribution conveyor belt. As the material distribution conveyor belt and the conveyor chain operate synchronously, the rivet nuts at this location are attracted to the material distribution conveyor belt by magnetic components and lifted along with the movement of the material distribution conveyor belt, thus achieving the convenient feeding effect of piled rivet nuts.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. During the process of the material distribution conveyor belt lifting the attracted rivet nuts, the material feeding mechanism pushes the material on the material distribution conveyor belt, which can also push the loose rivet nuts pressed on the attracted rivet nuts off the material distribution conveyor belt. This ensures that the rivet nuts after being transported by the material distribution conveyor belt can be transported to the heat treatment box as completely and evenly as possible, effectively ensuring the batch uniform heat treatment of the rivet nuts.

[0040] 2. Setting the magnetic components as multiple segmented magnetic blocks and setting the segmented magnetic blocks at an angle both help loose rivet nuts to slide off the attracted rivet nuts more quickly, making these loose rivet nuts easier to detach, and further improving the flattening rate of batches of rivet nuts when conveyed by the material leveling conveyor belt.

[0041] 3. By spraying high-speed airflow onto the material conveyor belt through the jet component, loose rivet nuts are more likely to fall off the material conveyor belt under the impact of the wind; and by driving the jet component to reciprocate through the power component, the angle of the wind impact on the rivet nuts can be continuously changed, which can further increase the probability of blowing off the loose rivet nuts that are pressed onto the adsorbed rivet nuts. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0043] Figure 2 This is a schematic diagram of the structure of the magnetic component, which is mainly used to illustrate Embodiment 1 of this application.

[0044] Figure 3 This is a schematic diagram of the main structure of Embodiment 2 of this application.

[0045] Attached label: 1. Vibrating screen;

[0046] 2. Material distribution conveyor belt; 21. Feeding rack;

[0047] 3. Heat treatment chamber;

[0048] 4. Cutting plate;

[0049] 51. Conveyor chain; 52. Magnetic component; 521. Segmented magnetic block; 522. Gap;

[0050] 61. Jet assembly; 611. Mounting rod; 612. Jet nozzle; 62. Power assembly;

[0051] 71. Flexible actuating component; 72. Drive assembly;

[0052] 8. Receiving hopper. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0054] Example 1:

[0055] This application discloses a heat treatment apparatus for rivet nuts. (Refer to...) Figure 1 and Figure 2 A heat treatment device for rivet nuts includes a vibrating screen 1, a material distribution conveyor belt 2, a heat treatment chamber 3, and a discharge plate 4 for connecting the material distribution conveyor belt 2 and the heat treatment chamber 3. The heat treatment chamber 3 has its own conveying device, and the discharge plate 4 is inclined downwards with its lower end connected to the conveying device. This application also includes:

[0056] The feeding frame 21 is located between the vibrating screen 1 and the heat treatment box 3. The material distribution conveyor belt 2 is installed on the feeding frame 21 at an upward inclination along its conveying direction; the inclination angle of the material distribution conveyor belt 2 is greater than 45°.

[0057] The conveyor chain 51 is installed on the loading frame 21 and is synchronously transmitted with the material equalization conveyor belt 2. The conveyor chain 51 is set in the inner ring of the material equalization conveyor belt 2, and the conveyor chain 51 and the material equalization conveyor belt 2 share a set of power roller system.

[0058] Magnetic components 52 are provided in multiples and are distributed at intervals along the length of the conveyor chain 51. The magnetic components 52 are in contact with the inner ring of the material equalization conveyor belt 2. The magnetic components 52 can be permanent magnets or electromagnets.

[0059] The material feeding mechanism is used to move the material on the material feeding conveyor belt 2.

[0060] And refer to Figure 1 The feeding rack 21 is equipped with a receiving hopper 8. One end of the receiving hopper 8 is located below the discharge port of the vibrating screen 1, and the other end is in contact with the material equalization conveyor belt 2. The receiving hopper 8 is set at a downward inclination along the conveying direction of the material equalization conveyor belt 2.

[0061] In this way, after the carbon steel rivet nuts to be processed are fed into the vibrating screen 1 in batches, the vibrating screen 1 vibrates and screens the rivet nuts to separate them as much as possible. Then, they are fed onto the material distribution conveyor belt 2 through the receiving hopper 8. With the synchronous transmission of the conveyor chain 51 and the material distribution conveyor belt 2, multiple magnetic components 52 adsorb some of the rivet nuts onto the material distribution conveyor belt 2 and lift them up with the material distribution conveyor belt 2. During this process, some of the loose rivet nuts that are freely piled on the adsorbed rivet nuts fall off under their own weight and the influence of the inclined conveying path of the material distribution conveyor belt 2. This can, to a certain extent, ensure that the rivet nuts conveyed to the heat treatment box 3 are in a flat state, and ensure the uniformity of heat treatment of the batch of rivet nuts.

[0062] Furthermore, during the process of the material distribution conveyor belt 2 lifting the adsorbed rivet nuts, the material feeding mechanism pushes the material on the material distribution conveyor belt 2, which can also push the loose rivet nuts pressed on the adsorbed rivet nuts off the material distribution conveyor belt 2. This ensures that the rivet nuts after being uniformly transported by the material distribution conveyor belt 2 can be transported to the heat treatment box 3 as completely and evenly as possible, effectively ensuring the batch uniform heat treatment of the rivet nuts.

[0063] In actual use, after the magnetic component 52 attracts the rivet nuts onto the material leveling conveyor belt 2, some loose rivet nuts will pile up on top of the attracted rivet nuts. The rivet nuts attracted onto the material leveling conveyor belt 2 are densely spread out on the material leveling conveyor belt 2 by the magnetic component 52 to form an attracted area. This attracted area is adapted to the shape of the magnetic component 52 and is basically strip-shaped along the width direction of the material leveling conveyor belt 2. This means that if loose rivet nuts want to be removed, they have to pass through this attracted area. Therefore, some loose rivet nuts will still be piled up in the attracted area, resulting in a low spreading rate of rivet nuts on the material leveling conveyor belt 2.

[0064] Therefore, the embodiments of this application address the issue from the following aspects:

[0065] In some feasible embodiments, multiple sets of material-pulling mechanisms can be set on the feeding rack 21 to increase the frequency of prying loose rivet nuts, thereby increasing the probability of loose rivet nuts being pulled off and ensuring the flattening rate of rivet nuts.

[0066] In other feasible embodiments, refer to Figure 2 The magnetic component 52 is configured as multiple segmented magnetic blocks 521 arranged along the width direction of the material leveling conveyor belt 2, with a gap 522 larger than the material size between adjacent segmented magnetic blocks 521. This reduces the travel distance of loose rivet nuts when they fall freely or are dislodged by the material-dispensing mechanism, making it easier for these loose rivet nuts to detach and improving the flattening rate of a batch of rivet nuts when conveyed by the material leveling conveyor belt 2.

[0067] In other feasible embodiments, refer to Figure 2 An angle is set between the extension direction of the magnetic component 52 and the width direction of the material leveling conveyor belt 2, so that the adsorption area is distributed obliquely on the material leveling conveyor belt 2. In this way, the rivet nuts adsorbed on the material leveling conveyor belt 2 can form a guide slope, which is more conducive to the slippage of scattered rivet nuts, and can also improve the flattening rate of batches of rivet nuts when conveyed by the material leveling conveyor belt 2.

[0068] Alternatively, the above-mentioned solutions can be combined in another embodiment. For example, the magnetic component 52 can be set as multiple segmented magnetic blocks 521, and the arrangement and extension direction of the multiple segmented magnetic blocks 521 can be set as inclined. Then, the superposition solution can significantly improve the flattening rate of the rivet nut when it is conveyed by the material equalization conveyor belt 2.

[0069] In addition, in specific implementation, the tilting directions of multiple segmented magnetic blocks 521 can be the same or different; when the tilting directions of multiple segmented magnetic blocks 521 are different, multiple segmented magnetic blocks 521 on the same horizontal plane can be in a simple figure-eight shape or in a complex wave shape, as long as it is ensured that there is a gap 522 between adjacent adsorption areas for a single rivet nut to pass through completely.

[0070] In the application embodiments, refer to Figure 2 By selecting multiple segmented magnetic blocks 521 to be arranged in a simple "eight" shape with their flared and constricted ends arranged sequentially along the conveying direction of the material equalization conveyor belt 2, the loose rivet nuts that fall off from the inclined adsorption area will slide off the edge of the material equalization conveyor belt 2, which can further reduce the probability of the loose rivet nuts falling onto the lower adsorption area, so as to ensure that the material feeding mechanism effectively cleans each adsorption area and maximizes the flattening rate of the rivet nuts when they are conveyed by the material equalization conveyor belt 2.

[0071] As a further, more specific setting, refer to Figure 1 The aforementioned material feeding mechanism includes:

[0072] The jetting component 61 is connected to an external high-pressure air source, is movably mounted on the loading rack 21, and the jetting direction is directed towards the surface of the upper section of the material conveyor belt 2.

[0073] The power assembly 62 drives the jetting component 61 to reciprocate. Specifically, the jetting component 61 moves along the conveying direction of the material distribution conveyor belt 2, or perpendicular to the conveying direction of the material distribution conveyor belt 2, or at an angle to the conveying direction of the material distribution conveyor belt 2. Furthermore, the cycle time of one reciprocating motion of the jetting component 61 is less than the cycle time of two adjacent magnetic components 52 passing through the jetting component 61, so that the rivet nut in each adsorption zone is impacted at least once by the airflow ejected from the jetting component 61.

[0074] The power component 62 can be configured as a rotary drive component that can achieve reciprocating rotation, such as a servo motor or a rotary cylinder, or a linear drive component that can achieve reciprocating movement, such as a cylinder, an electric push rod, or a linear motor.

[0075] In this way, when the rivet nuts on the material distribution conveyor belt 2 pass through the jet nozzle 61 in sequence, the jet nozzle 61 sprays a high-speed airflow that impacts the rivet nuts on the material distribution conveyor belt 2. The rivet nuts that are piled up or pressed onto the material distribution conveyor belt 2 fall off under the wind force impact of the jet nozzle 61, thereby reducing the probability of rivet nuts piling up on the material distribution conveyor belt 2. Furthermore, the power component 62 also drives the jet nozzle 61 to reciprocate, so that the wind force impact angle of the jet nozzle 61 on the rivet nuts is constantly changing, which can further increase the probability of blowing off the loose rivet nuts that are pressed onto the rivet nuts.

[0076] Meanwhile, in order to enhance the effect of the jet component 61 in removing loose rivet nuts, refer to Figure 1 On the one hand, the air outlet direction of the jet component 61 is inclined from bottom to top, which can promote the detachment of loose rivet nuts from the adsorption area. On the other hand, the jet component 61 includes a mounting rod 611 and multiple jet nozzles 612 mounted on the mounting rod 611, and the blowing areas of two adjacent jet nozzles 612 on the material equalization conveyor belt 2 do not overlap; in this way, when the multiple jet nozzles 612 spray high-speed airflow to impact the loose rivet nuts, the contact area between the high-speed airflow sprayed by the jet nozzles 612 and the loose rivet nuts can be reduced, so as to achieve the eccentric impact of the high-speed airflow on the loose rivet nuts as much as possible, and at the same time achieve intermittent impact of multiple jet nozzles 612 on the loose rivet nuts, thereby promoting the frequent flipping and jumping of the loose rivet nuts on the material equalization conveyor belt 2, so as to increase the probability of the loose rivet nuts pressed on the material equalization conveyor belt 2 falling off.

[0077] The implementation principle of the rivet nut heat treatment equipment in this application embodiment is as follows: The vibrating screen 1 conveys the carbon steel rivet nuts to the uniform conveyor belt 2. With the synchronous transmission of the conveyor chain 51 and the uniform conveyor belt 2, multiple magnetic components 52 adsorb the rivet nuts onto the uniform conveyor belt 2 and lift them along with the uniform conveyor belt 2. During this process, some loose rivet nuts that are freely piled on the adsorbed rivet nuts fall off due to their own weight and the influence of the inclined conveying path of the uniform conveyor belt 2; another part of the loose rivet nuts are not directly adsorbed by the magnetic components 52 but are pressed onto the uniform conveyor belt 2. When this part of the loose rivet nuts passes through the jet component 61, the high-speed airflow ejected by multiple jet nozzles 612 can impact the loose rivet nuts with wind force. Therefore, the loose rivet nuts pressed onto the adsorbed rivet nuts are also pushed off the uniform conveyor belt 2, thereby maximizing the ability of the rivet nuts after uniform transmission by the uniform conveyor belt 2 to be conveyed to the heat treatment box 3 as completely and evenly as possible, effectively ensuring the batch uniform heat treatment of the rivet nuts.

[0078] Example 2:

[0079] This application discloses a heat treatment apparatus for rivet nuts. (Refer to...) Figure 3 The difference from Embodiment 1 is that the feeding mechanism includes:

[0080] The flexible agitator 71 is arranged along the width direction of the material conveyor belt 2, and the flexible part on the flexible agitator 71 is in interference contact with the upper section of the material conveyor belt 2; and specifically, the flexible agitator 71 needs to be arranged along the length direction of the magnetic part 52 or the arrangement direction of the segmented magnetic blocks 521. The flexible agitator 71 can be a brush, brush roller, etc., and the flexible part on it should be soft plastic bristles.

[0081] The drive assembly 72 is used to drive the flexible agitator 71 to reciprocate along the width of the material conveyor belt 2. Specifically, it can be a linear drive component such as a cylinder, an electric push rod, or a linear motor.

[0082] In this way, when the material conveyor belt 2 conveys the rivet nuts past the flexible agitator 71, the flexible agitator 71 sweeps the scattered rivet nuts on the material conveyor belt 2, which can knock off the scattered rivet nuts as much as possible; and the drive assembly 72 further drives the flexible agitator 71 to reciprocate, giving the scattered rivet nuts the kinetic energy to fall off, which can further promote the knocking off of the scattered rivet nuts.

[0083] In other feasible embodiments, the feeding mechanism in this embodiment can be combined with the feeding mechanism in embodiment 1 to improve the feeding effect.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat treatment device for rivet nuts, comprising a vibrating screen (1), a material distribution conveyor belt (2), a heat treatment chamber (3), and a discharge plate (4) for connecting the material distribution conveyor belt (2) and the heat treatment chamber (3), characterized in that: Also includes: A feeding rack (21) is located between the vibrating screen (1) and the heat treatment box (3). The material equalization conveyor belt (2) is installed on the feeding rack (21) at an upward inclination along its conveying direction. A conveyor chain (51) is installed on the feeding rack (21) and is synchronously transmitted with the material equalization conveyor belt (2). The conveyor chain (51) is located in the inner ring of the material equalization conveyor belt (2). Magnetic components (52) are provided in multiples and are distributed at intervals along the length direction of the conveyor chain (51). The magnetic component (52) includes a plurality of segmented magnetic blocks (521) arranged along the width direction of the material conveyor belt (2), and there is a gap (522) between two adjacent segmented magnetic blocks (521) that is larger than the material size. The extension direction of the segmented magnetic block (521) has an angle with the width direction of the uniform material conveyor belt (2); A material feeding mechanism is used to move the material on the material feeding conveyor belt (2); The material feeding mechanism includes: an air jet (61) mounted on the feeding rack (21) with the air jet direction pointing towards the upper section of the material conveyor belt (2); and a power assembly (62) for driving the air jet (61) to reciprocate.

2. The rivet nut heat treatment equipment according to claim 1, characterized in that: The jetting component (61) moves along the conveying direction of the material leveling conveyor belt (2), or perpendicular to the conveying direction of the material leveling conveyor belt (2), or at an angle to the conveying direction of the material leveling conveyor belt (2).

3. The rivet nut heat treatment equipment according to claim 2, characterized in that: The cycle time of one reciprocating motion of the jet (61) is less than the cycle time of two adjacent magnetic elements (52) passing through the jet (61).

4. The rivet nut heat treatment equipment according to claim 2, characterized in that: The jetting element (61) is inclined from bottom to top in the direction of air discharge.

5. The rivet nut heat treatment equipment according to claim 1, characterized in that: The jetting component (61) includes a mounting rod (611) and a plurality of jet nozzles (612) mounted on the mounting rod (611).

6. The heat treatment equipment for rivet nuts according to claim 5, characterized in that: The blowing areas of two adjacent jet nozzles (612) on the uniform conveyor belt (2) do not overlap.

7. A heat treatment apparatus for rivet nuts according to any one of claims 1-6, characterized in that: The material feeding mechanism includes: a flexible agitator (71) arranged along the width direction of the material feeding conveyor belt (2), and the flexible part on the flexible agitator (71) is in interference contact with the upper section of the material feeding conveyor belt (2); and a drive assembly (72) for driving the flexible agitator (71) to reciprocate along the width direction of the material feeding conveyor belt (2).

8. The heat treatment equipment for rivet nuts according to claim 7, characterized in that: The feeding rack (21) is equipped with a receiving hopper (8). One end of the receiving hopper (8) is located below the discharge port of the vibrating screen (1), and the other end is in contact with the material equalization conveyor belt (2). The receiving hopper (8) is inclined downward along the conveying direction of the material equalization conveyor belt (2).

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